import 'package:flutter_test/flutter_test.dart';
import 'package:awak/common/models/user.dart';
import 'package:awak/common/repository/user_repository.dart';

void main() {
  group('User Authentication Tests', () {
    late UserRepository userRepository;

    setUp(() {
      userRepository = UserRepository();
      // 重置当前用户状态
      userRepository.currentUser = null;
    });

    test('should handle current user ID retrieval correctly', () {
      // 测试未登录状态
      expect(userRepository.currentUser, isNull);
      expect(userRepository.currentUser?.id, isNull);

      // 模拟登录状态
      final testUser = User(
        id: 123,
        username: 'testuser',
        password: 'password123',
        nickname: 'Test User',
        avatar: 'test_avatar.jpg',
        signature: 'Test signature',
      );

      userRepository.currentUser = testUser;

      // 验证当前用户ID获取
      expect(userRepository.currentUser, isNotNull);
      expect(userRepository.currentUser?.id, 123);
      expect(userRepository.currentUser?.username, 'testuser');
      expect(userRepository.currentUser?.nickname, 'Test User');
    });

    test('should validate content creation with current user ID', () {
      // 测试内容创建时的用户ID验证逻辑

      // 1. 未登录状态 - 应该返回null
      final currentUserId1 = userRepository.currentUser?.id;
      expect(currentUserId1, isNull);

      // 2. 登录状态 - 应该返回正确的用户ID
      userRepository.currentUser = User(
        id: 456,
        username: 'contentcreator',
        password: 'password456',
      );

      final currentUserId2 = userRepository.currentUser?.id;
      expect(currentUserId2, 456);
      expect(currentUserId2, isNotNull);
      expect(currentUserId2, greaterThan(0));
    });

    test('should handle user repository singleton pattern', () {
      // 测试UserRepository的单例模式
      final repo1 = UserRepository();
      final repo2 = UserRepository();

      // 应该是同一个实例
      expect(identical(repo1, repo2), true);

      // 设置用户状态应该在所有实例中共享
      repo1.currentUser = User(
        id: 789,
        username: 'singleton_test',
        password: 'test123',
      );

      expect(repo2.currentUser?.id, 789);
      expect(repo2.currentUser?.username, 'singleton_test');
    });

    test('should validate user authentication flow', () {
      // 测试用户认证流程

      // 1. 初始状态 - 未登录
      expect(userRepository.currentUser, isNull);

      // 2. 模拟登录成功
      final loginUser = User(
        id: 100,
        username: 'loginuser',
        password: 'loginpass',
        nickname: 'Login User',
      );

      userRepository.currentUser = loginUser;

      // 3. 验证登录状态
      expect(userRepository.currentUser, isNotNull);
      expect(userRepository.currentUser?.id, 100);

      // 4. 模拟退出登录
      userRepository.currentUser = null;

      // 5. 验证退出状态
      expect(userRepository.currentUser, isNull);
    });

    test('should handle edge cases for user ID retrieval', () {
      // 测试用户ID获取的边界情况

      // 1. 用户对象存在但ID为null
      userRepository.currentUser = User(
        id: null,
        username: 'no_id_user',
        password: 'password',
      );

      expect(userRepository.currentUser, isNotNull);
      expect(userRepository.currentUser?.id, isNull);

      // 2. 用户对象存在且ID为0
      userRepository.currentUser = User(
        id: 0,
        username: 'zero_id_user',
        password: 'password',
      );

      expect(userRepository.currentUser?.id, 0);

      // 3. 用户对象存在且ID为负数
      userRepository.currentUser = User(
        id: -1,
        username: 'negative_id_user',
        password: 'password',
      );

      expect(userRepository.currentUser?.id, -1);

      // 4. 正常的正整数ID
      userRepository.currentUser = User(
        id: 999,
        username: 'normal_user',
        password: 'password',
      );

      expect(userRepository.currentUser?.id, 999);
      expect(userRepository.currentUser?.id, greaterThan(0));
    });

    test('should validate content release page user ID logic', () {
      // 测试内容发布页面的用户ID逻辑

      // 模拟内容发布页面的用户ID获取逻辑
      bool shouldAllowContentCreation(UserRepository repo) {
        final currentUserId = repo.currentUser?.id;
        return currentUserId != null && currentUserId > 0;
      }

      // 1. 未登录 - 不允许创建内容
      userRepository.currentUser = null;
      expect(shouldAllowContentCreation(userRepository), false);

      // 2. ID为null - 不允许创建内容
      userRepository.currentUser = User(
        id: null,
        username: 'null_id',
        password: 'pass',
      );
      expect(shouldAllowContentCreation(userRepository), false);

      // 3. ID为0 - 不允许创建内容
      userRepository.currentUser = User(
        id: 0,
        username: 'zero_id',
        password: 'pass',
      );
      expect(shouldAllowContentCreation(userRepository), false);

      // 4. ID为负数 - 不允许创建内容
      userRepository.currentUser = User(
        id: -5,
        username: 'negative_id',
        password: 'pass',
      );
      expect(shouldAllowContentCreation(userRepository), false);

      // 5. 正常ID - 允许创建内容
      userRepository.currentUser = User(
        id: 42,
        username: 'valid_user',
        password: 'pass',
      );
      expect(shouldAllowContentCreation(userRepository), true);
    });

    test('should handle user data completeness', () {
      // 测试用户数据完整性

      // 创建完整的用户对象
      final completeUser = User(
        id: 555,
        username: 'complete_user',
        password: 'secure_password',
        nickname: 'Complete User',
        avatar: 'avatar.jpg',
        birthday: '1990-01-01',
        signature: 'Complete user signature',
        city: 'Test City',
      );

      userRepository.currentUser = completeUser;

      // 验证所有字段
      expect(userRepository.currentUser?.id, 555);
      expect(userRepository.currentUser?.username, 'complete_user');
      expect(userRepository.currentUser?.nickname, 'Complete User');
      expect(userRepository.currentUser?.avatar, 'avatar.jpg');
      expect(userRepository.currentUser?.signature, 'Complete user signature');
      expect(userRepository.currentUser?.city, 'Test City');

      // 验证必需字段
      expect(userRepository.currentUser?.username.isNotEmpty, true);
      expect(userRepository.currentUser?.password.isNotEmpty, true);
    });

    test('should validate user ID for different operations', () {
      // 测试不同操作的用户ID验证

      // 设置测试用户
      userRepository.currentUser = User(
        id: 777,
        username: 'operation_user',
        password: 'op_password',
      );

      final currentUserId = userRepository.currentUser?.id;

      // 验证用户ID可用于各种操作
      expect(currentUserId, isNotNull);
      expect(currentUserId, 777);

      // 模拟内容创建操作
      final canCreateContent = currentUserId != null;
      expect(canCreateContent, true);

      // 模拟房间创建操作（如果需要用户ID）
      final canCreateRoom = currentUserId != null;
      expect(canCreateRoom, true);

      // 模拟评论操作
      final canComment = currentUserId != null;
      expect(canComment, true);
    });
  });
}
